CN103075183A - Method for detecting information of survivors in mine disasters - Google Patents
Method for detecting information of survivors in mine disasters Download PDFInfo
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- CN103075183A CN103075183A CN2012105765195A CN201210576519A CN103075183A CN 103075183 A CN103075183 A CN 103075183A CN 2012105765195 A CN2012105765195 A CN 2012105765195A CN 201210576519 A CN201210576519 A CN 201210576519A CN 103075183 A CN103075183 A CN 103075183A
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Abstract
The invention provides a method for detecting information of survivors in mine disasters. Specific to the inconvenience in transmitting underground and ground information in case of mine disasters, the invention provides a scheme for transmitting information through shock waves by taking an existing metal pipeline network in a mine area as a transmission medium and detecting survivors in mine holes in a way of detecting the shock waves generated by knocking metal pipelines in the mine holes by taking a plurality of ground sensors as receiving units. According to the method, the presence of trapped people can be determined reliably by detecting the shock waves generated by knocking the metal pipelines.
Description
Technical field
The invention belongs to Testing of Feeble Signals and treatment technology.
Background technology
Entered since 21 century, the development work of human life's search and location technology and equipment has caused the concern of many countries, some developed countries in addition by the legislation or take other measures that it is fulfilled.China is because the natural calamity and the accident of mine disaster that meet with happen occasionally, and therefore, how haveing breakthrough in the rescue aid field becomes new topic.
Take coal industry as example, because the geographical position in hole, ore deposit is buried in underground, earth formation is complicated, conventional electrical information is difficult to penetrate bottom and is delivered to ground, on the other hand, subsurface equipment is easy to damage usually in seismic process, and this timely discovery and rescue to existence personnel after the mine disaster has brought difficulty.Will transmit and ground can receive at underground about two, 300 meters such as conventional electromagnetic signal, its transmitting and receiving apparatus all can very complicated (such as myriametric wave equipment), and be subject to extraneous physics and hit easily and damage.And sound wave (between 20 hertz and 20 kilo hertzs) is when between frequency 4-24kHz, its penetration power about 2m for general coarse chad, and earth is 40m approximately; When frequency during between 2-16kHz, its penetration power is for general coarse chad 6m, earth 80m, so sound wave (containing ultrasonic wave) also is unsuitable for launching under the mine.
Summary of the invention
Technical problem to be solved by this invention is a kind of difficulty survival personal information detection method that is applicable to the mine disaster relief.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be, a kind of method of surveying mine disaster survival personal information is characterized in that,
A plurality of sensors are set respectively on many metallic conduits that extend to ground;
Sensor knocks the shock wave that metallic conduit produces take the piping network in the mining area in the hole, ore deposit as transmission medium receives;
Each sensor is sent to data processing unit with the signal that receives by data acquisition unit, and the signal that data processing unit receives each sensor carries out data to be processed and fusion.
Underground inconvenience of transmitting with terrestrial information when the present invention is directed to mine disaster, ready-made metallic conduit network has been proposed in the mining area as transmission medium, by the shock wave transmission of information, a plurality of sensors are receiving element take ground, detect the scheme that the shock wave that knocks the metallic conduit generation in the hole, ore deposit is surveyed survival personnel in the hole, ore deposit.Shock wave can be propagated with the speed of per second 1～2 km in the rock stratum, even if at mantle rock, the spread speed of hundreds of meters of per seconds can be arranged also.Because the geographical position in hole, ore deposit is buried in underground, shock wave be reached ground, the shock wave communication media need to be considered the little medium of decaying.The a large amount of metallic network of pipelines of ubiquity in the mining area, until ground, and after mine disaster occured, because the ability of the anti-physical damage of metal medium is strong, the destruction of metallic network of pipelines can't affect the vibrations wave propagation in the hole, ore deposit.Therefore, the present invention adopts in the mining area existing metallic network of pipelines to have as transmission medium to propagate soon, and propagation loss is little, the characteristics that anti-destructive is strong.Because metallic network of pipelines extends in all direction in the hole, ore deposit, can arrive ground via a plurality of places, in order to increase signal detection rating, antagonism is because Local physical damages the situation of the local pipeline break that causes, extend all sensor installations of point at a plurality of surface ducts, consist of the sensor group.Further, when data processing unit can accurate reduction knock mode by the shock wave that analysis receives, just can be for survival personnel in the hole, ore deposit to come transmission of information that reliable technical support is provided by certain coding that knocks, information can comprise such as survival personnel's particular location and personnel's number etc.
Concrete, described sensor is the three-component sensor.Data processing unit is analyzed three component datas in each sensor by wavelet decomposition, remerges three-component receive data and obtains shock wave data from this sensor.
The invention has the beneficial effects as follows, can detect reliably the shock wave that knocks the metallic conduit generation and determine the existence of trapped personnel, further obtain mine disaster survival personnel relevant information by the reduction mode of knocking exactly, help to carry out in time rescue work, improve rescue efficiency.
Description of drawings
Fig. 1 is that the embodiment system consists of schematic diagram;
Fig. 2 is that system sensor is settled schematic diagram;
Fig. 3 is that sensor receives first polytropism schematic diagram;
Fig. 4 is the embodiment personnel number information code pattern of surviving;
Fig. 5 is the embodiment personnel positions information coding figure that survives
Fig. 6 is each component primary signal (a) of embodiment single-sensor and testing result (b);
Fig. 7 is embodiment different sensors reception condition;
Fig. 8 is embodiment data fusion result.
The specific embodiment
Survey for the colliery shock wave, system as shown in Figure 1, comprise n three-component high-precision sensor, n data collecting unit and data processing unit, the data on three components that each three-component high-precision sensor will receive by coupled data acquisition unit are sent to data processing unit.The ground metal pipe outlet has n, then the three-component high-precision sensor is fixed thereon with pipe clamp in this n exit, as shown in Figure 2.The three-component high-precision sensor gathers shock wave from orthogonal x, y, three component directions of z as shown in Figure 3.The vibrations wave frequency that produces by knocking metal is between a few to tens of hertz.Here the frequency range of the reception signal of sensor should comprise the frequency range of knocking shock wave, for the reliability that guarantees to receive, the receive frequency range of extension sensor group, the receiving center frequency of each sensor setting can be offset to some extent, centre frequency such as sensor 1 is 13Hz, the centre frequency of sensor 2 is 16Hz, and the centre frequency of sensor n is 20Hz.
Coding and the mode of knocking are arranged: mainly transmit two important informations, and the one, current place survival personnel number, the 2nd, general geographic location.
Transmit take 33 as the information code harbour such as, survival personnel information of number, represent that follow-up is survival personnel information of number, the back represents thousand with interior personnel's number with 3 10 systems.Concrete method for expressing is: with the digital n that expression under interval left and right sides double hit in the 3 seconds n is transmitted, numeral 0 is with double hit 10 expression of getting off.Transmitting current location survival personnel number such as needs is 421 people, and then actual transmission code word is 33421, knocks metallic conduit in the mode such as Fig. 4.Repeatedly send this information such as need, then upper once after information is finished the interval retransmit 33421 more than 15 seconds.
Geographical location information transmits take 22 as the information code harbour, represents that follow-up is survival personnel geographical location information.Geographical location information is to be divided with grid configuration according to drive true form and size in advance by the mining area, is numbered again.For example, inform that such as needs there are the survival personnel in ground in No. 121 zones, then send 22121, specifically knock mode as shown in Figure 5.Repeatedly send this information such as need, then upper once after information is finished the interval retransmit 22121 more than 15 seconds.
Geography information and number information can alternately send, as after sending 33421, the interval was 22121 such as what send in 15 seconds, and what then next expression sent is geographical location information.
As in advance not the mode of knocking arrange, sensing system then can only be by detecting the regular existence that Sasser is determined the survival personnel of knocking.
Knocking is delivered to data processing unit after being attached to single-sensor on the metallic conduit and being sent to data acquisition unit by ground, adopts the Daubechies wavelet basis to carry out 5 grades of discrete wavelets and decomposes, and extracts 3rd level detail coefficients cA in the wavelet decomposition
3, according to cA
3Mode is knocked in reduction.
Data instance with actual acquisition is analyzed, and knocks the place from receiving about 1 kilometer in place.The transmission of information word is 3,3 times metallic conduits of interval double hit in 5 seconds, and the signal that a certain three-component sensor receives in the sensor group on ground is shown in Fig. 6 (a), and the information that receives is sent to data processing unit after the data acquisition unit collection.Fig. 6 (b) is process signal detection post processing result, wherein, consider some influence of noises, data processing unit filters the pulse of interval less than 0.5 second, can find out result from Fig. 6 (b), because the characteristic that Sasser is propagated and the polytropism of medium cause only having one to carry out effective reception in three components of sensor.Be decoded as 3.Realized the correct information transmission.
With once knocking for different receiving elements, its time of advent is difference to some extent, but because metal media transmission speed is fast, so each receiving element Sasser time of advent was less than 1 second, therefore, when processing each receiving element data, from thinking from same source with interior Sasser being separated by of different receiving elements ± 0.5 second.Because the quality of propagation path is different, the undetected problem of some receiving element may occur, but owing to being that multisensor receives, as long as can think have most sensors to receive signal in the roughly the same moment, think that then there is knocking constantly in this.To Fusion, can in the loss that to a certain degree reduces knocking, improve the information reverting degree through data processing unit.Such as, when the sensor group is comprised of 3 sensors, because the difference of propagation path, these 3 sensors receive signal as shown in Figure 7, the signal that causes 3 sensors to receive all has difference, and as seen from the figure, No. 1 sensor receives information bit 21121, No. 2 sensors receive 22111, No. 3 sensors of information bit and receive information bit 12121.Data processing unit is through the reception condition comparison of identical moment, and final system comprehensively is output as result shown in Figure 8, namely 22121, be interpreted as " geographical position is in No. 121 zones " thus reduction is by the metallic conduit transmission of information effectively.
Claims (6)
1. a method of surveying mine disaster survival personal information is characterized in that, comprising:
A plurality of sensors are set respectively on many metallic conduits that extend to ground;
Sensor knocks the shock wave that metallic conduit produces take the piping network in the mining area in the hole, ore deposit as transmission medium receives;
Each sensor is sent to data processing unit with the signal that receives by data acquisition unit, and the signal that data processing unit receives each sensor carries out data to be processed and fusion.
2. require a kind of method of surveying mine disaster survival personal information as described in 1 such as power, it is characterized in that, described sensor is the three-component sensor.
3. require a kind of method of surveying mine disaster survival personal information as described in 2 such as power, it is characterized in that, data processing unit is analyzed three component datas in each sensor by wavelet decomposition, remerges three-component receive data and obtains shock wave data from this sensor.
4. require a kind of method of surveying mine disaster survival personal information as described in 1 such as power, it is characterized in that, data processing unit filters the interval that comes from same sensor less than the pulse of minimum interval.
5. require a kind of method of surveying mine disaster survival personal information as described in 1 such as power, it is characterized in that, data processing unit will be judged as same Sasser pulse from the Sasser pulse that is divided into mutually in the minimum interval of different sensors when the data from different sensors are merged.
6. require a kind of method of surveying mine disaster survival personal information as described in 4 or 5 such as power, it is characterized in that, described minimum interval is 0.5 second.
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| CN201210576519.5A CN103075183B (en) | 2012-12-27 | 2012-12-27 | Method for detecting information of survivors in mine disasters |
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| CN201210576519.5A CN103075183B (en) | 2012-12-27 | 2012-12-27 | Method for detecting information of survivors in mine disasters |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2351995A (en) * | 1999-07-09 | 2001-01-17 | Dbt Autom Gmbh | A method and device for detecting the presence of personnel in underground mining |
| CN101265812A (en) * | 2008-05-09 | 2008-09-17 | 山东大学 | Electricity-free optical fiber vibration calling system for down-hole of mine |
| CN101834675A (en) * | 2010-04-29 | 2010-09-15 | 四川大学 | Method for carrying out sound communication on underground and ground during underground rescue |
| CN102096065A (en) * | 2010-11-16 | 2011-06-15 | 东北师范大学 | Rescuing and positioning system by knocks for mine disaster |
| CN202250234U (en) * | 2011-09-13 | 2012-05-30 | 代剑华 | Passive post-disaster downhole information acquisition system with positioning capability |
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2012
- 2012-12-27 CN CN201210576519.5A patent/CN103075183B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2351995A (en) * | 1999-07-09 | 2001-01-17 | Dbt Autom Gmbh | A method and device for detecting the presence of personnel in underground mining |
| CN101265812A (en) * | 2008-05-09 | 2008-09-17 | 山东大学 | Electricity-free optical fiber vibration calling system for down-hole of mine |
| CN101834675A (en) * | 2010-04-29 | 2010-09-15 | 四川大学 | Method for carrying out sound communication on underground and ground during underground rescue |
| CN102096065A (en) * | 2010-11-16 | 2011-06-15 | 东北师范大学 | Rescuing and positioning system by knocks for mine disaster |
| CN202250234U (en) * | 2011-09-13 | 2012-05-30 | 代剑华 | Passive post-disaster downhole information acquisition system with positioning capability |
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